Sunday, July 12, 2009

Running Pepper: a miracle of surface tension

Here we have another example of science experiments that uses surface tension to works.
Spread peppers in a plate full of water as the video above shows, then put a drop of liquid soap on your finger and put the finger in the middle of the plate to make the peppers run away.
In the post "How many pins is possible to put in a glass full of water" we explain what is surface tension, the soap will reduce the surface tension (the attractive force between the molecules of surface) and the water will run and carry the peppers with it.

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